package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.constant.RedisConstant;
import com.atguigu.lease.common.exception.LeaseException;
import com.atguigu.lease.common.result.ResultCodeEnum;
import com.atguigu.lease.common.utils.JwtUtil;
import com.atguigu.lease.model.entity.SystemUser;
import com.atguigu.lease.model.enums.BaseStatus;
import com.atguigu.lease.web.admin.mapper.SystemUserMapper;
import com.atguigu.lease.web.admin.service.LoginService;
import com.atguigu.lease.web.admin.vo.login.CaptchaVo;
import com.atguigu.lease.web.admin.vo.login.LoginVo;
import com.atguigu.lease.web.admin.vo.system.user.SystemUserInfoVo;
import com.wf.captcha.SpecCaptcha;
import com.wf.captcha.base.Captcha;
import org.apache.commons.codec.digest.DigestUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import java.util.UUID;
import java.util.concurrent.TimeUnit;

@Service
public class LoginServiceImpl implements LoginService {

    @Autowired
    private StringRedisTemplate redisTemplate;

    @Autowired
    private SystemUserMapper systemUserMapper;

    //生成图形验证码
    @Override
    public CaptchaVo getCaptcha() {
        //生成验证码图片
        SpecCaptcha specCaptcha = new SpecCaptcha(130, 48, 4);
        specCaptcha.setCharType(Captcha.TYPE_DEFAULT);
        //验证码不区分大小写,所以将验证码全改成小写
        String code = specCaptcha.text().toLowerCase();
        //生成uuid作为key
        String key = RedisConstant.ADMIN_LOGIN_PREFIX + UUID.randomUUID();
        //将验证码图片通过base64算法转换为string类型
        String image = specCaptcha.toBase64();
        //将key和code存储在redis中并设置过期时间为60s
        redisTemplate.opsForValue().set(key,code,RedisConstant.ADMIN_LOGIN_CAPTCHA_TTL_SEC, TimeUnit.SECONDS);
        //将图片和key回传给前端用于登录的验证
        return new CaptchaVo(image,key);
    }

    @Override
    public String login(LoginVo loginVo) {
        //首先判断用户是否输入了验证码
        if(loginVo.getCaptchaCode()==null){
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_NOT_FOUND);
        }
        //判断用户输入的验证码是否正确
        String code = redisTemplate.opsForValue().get(loginVo.getCaptchaKey());
        //先判断验证码是否过期
        if(code==null){
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_EXPIRED);
        }
        //然后判断是否正确
        //
        if(!code.equals(loginVo.getCaptchaCode().toLowerCase())){
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_ERROR);
        }
        //判断用户是否存在
        //LambdaQueryWrapper<SystemUser> queryWrapper = new LambdaQueryWrapper<>();
        //queryWrapper.eq(SystemUser::getUsername,loginVo.getUsername());
        //由于在SystemUser的password字段设置了"select = false",
        //所以使用mybatis-plus通用方法不会查询password字段,但是我们这里需要使用密码进行验证
        //所以这里自定义一个查询方法
        SystemUser systemUser = systemUserMapper.selectByUsername(loginVo.getUsername());
        if(systemUser==null){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_NOT_EXIST_ERROR);
        }
        //判断用户状态是否被禁用
        if(systemUser.getStatus()== BaseStatus.DISABLE){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_DISABLED_ERROR);
        }
        //判断密码是否正确,注意数据表保存的密码是经过加密的,所以也要对前端传入的密码进行加密
        if(!systemUser.getPassword().equals(DigestUtils.md5Hex(loginVo.getPassword()))){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_ERROR);
        }
        return JwtUtil.createToken(systemUser.getId(),systemUser.getUsername());
    }

    @Override
    public SystemUserInfoVo getLoginUserInfoById(Long userId) {
        SystemUser systemUser = systemUserMapper.selectById(userId);
        String name = systemUser.getName();
        String avatarUrl = systemUser.getAvatarUrl();
        SystemUserInfoVo systemUserInfoVo = new SystemUserInfoVo();
        systemUserInfoVo.setName(name);
        systemUserInfoVo.setAvatarUrl(avatarUrl);
        return systemUserInfoVo;
    }
}
